A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Numerical Investigation of Seepage Force Acting on Interfacial Bed Particles by DEM-LBM
The experimental investigations of seepage force on interfacial bed particles furnish only macroscopic phenomenological characteristics. Microscopic numerical analyses provide effective alternative tools to assess the hydraulic and deformation characteristics of cohesionless granular soils of seepage domain in a coupled fashion. The present study reports the application of a 3-D direct particle–fluid simulation model for seepage force on interfacial bed particles of cohesionless granular soils. The seepage force acting on particles comprising the uppermost layer of cohesionless granular soils bed is studied numerically from the micromechanical aspects without macroscopic assumptions. The particle scale calculations are modeled by a soft sphere model, such as the Discrete Element Method (DEM), and the flow of the pore fluid is directly solved at a smaller scale than the diameter of the soil particles by the Lattice Boltzmann Method (LBM). The interaction between the soil particles and the seepage flow is also considered by coupling these methods. A number of series of analyses until critical hydraulic gradient are accomplished. The result shows that the numerically predicted value for the seepage force coefficient of particles near the surface is reduced regardless of the hydraulic gradient. However, the numerical result is not in good agreement with the experimental result reported in (Martin and Aral 1971).
Numerical Investigation of Seepage Force Acting on Interfacial Bed Particles by DEM-LBM
The experimental investigations of seepage force on interfacial bed particles furnish only macroscopic phenomenological characteristics. Microscopic numerical analyses provide effective alternative tools to assess the hydraulic and deformation characteristics of cohesionless granular soils of seepage domain in a coupled fashion. The present study reports the application of a 3-D direct particle–fluid simulation model for seepage force on interfacial bed particles of cohesionless granular soils. The seepage force acting on particles comprising the uppermost layer of cohesionless granular soils bed is studied numerically from the micromechanical aspects without macroscopic assumptions. The particle scale calculations are modeled by a soft sphere model, such as the Discrete Element Method (DEM), and the flow of the pore fluid is directly solved at a smaller scale than the diameter of the soil particles by the Lattice Boltzmann Method (LBM). The interaction between the soil particles and the seepage flow is also considered by coupling these methods. A number of series of analyses until critical hydraulic gradient are accomplished. The result shows that the numerically predicted value for the seepage force coefficient of particles near the surface is reduced regardless of the hydraulic gradient. However, the numerical result is not in good agreement with the experimental result reported in (Martin and Aral 1971).
Numerical Investigation of Seepage Force Acting on Interfacial Bed Particles by DEM-LBM
Lecture Notes in Civil Engineering
Barla, Marco (editor) / Di Donna, Alice (editor) / Sterpi, Donatella (editor) / Jewel, Arif (author) / Fujisawa, Kazunori (author) / Fukumoto, Yutaka (author) / Murakami, Akira (author)
International Conference of the International Association for Computer Methods and Advances in Geomechanics ; 2021 ; Turin, Italy
2021-01-15
9 pages
Article/Chapter (Book)
Electronic Resource
English
Seepage Force on Interfacial Bed Particles
| ASCE | 2021
Erratum for “Seepage Force on Interfacial Bed Particles”
| ASCE | 2021
Embankment Seepage Investigation
| TIBKAT | 2018